Air-valve for automobile-engines.



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v AFPUCA'HQN FILED SEPT. 4. wim

WILLIAM C. IZL'QGEL, 0F ADRIAN, MICHIGAI'?.

AIR-VALVE FOR AUTOMOBILE-ENGINES.

Application sied september 4. 1914.

. To all whom 'it may] concern Re it known that l, rimani C. ENGEL, a citizen of the llnited States, residing at Aidrian, in the county of Lenawee and State of Michigan, have invented certain new and useful Improvements in Air-'Valves tor .\u toinoblle-llngines, of which the following is a spccllication, reference4 being had to the accompanying drawings. 14)V My invention relates tov new and useful improvements in air Valves for automobile engines and has particular reference to those ot' the type which are interposed between the carburcter and intake manifold flanges.

One of the principal objects ot my invention is to construct an air Yalre which will open for the admission of additional air into the intake manifold in response to a decrease in the extent of the vacuum or suction in the manifold, rather than to increased suction: vA further and more specific object of the i invention is to provide a valve which consists essentially in a plate-like body member adapted to be interposed between the coupling iiangcs of the intake manifold and carburetor, a piston which controls the valve of the air passage, and a spring whlch norbodiment of this invention, as it is reduced to practice, and throughout the several views ot whichv similar reference numerals designate corresponding' parts, Figure 1 is a plan View partly in section and Fig. 2 is an edge View. As best shown in Fig. 1 of the accompany ing drawings, the valve includes a body member 1, which is formed in the nature of a substantially oval a d flat plate, in the center of which is forme a circular opening 12. This body plate is designedto be interposed between thecoupling flanges of the `manifoldintake and the carburetor. When f the body plate is properlyl positioned, the open1ng-2 forms a' continuation of the mani- Specication of Letters Patent.

Serial No. 860,256.-

told and the lead pipe of the carbureter. .\n air inlet passage 3 is formed in the body plate. 4This passage extends' tangentially with respect to the opening Q-.and at .its outer end opens through the edge of the body plate. `Extending at right angles to the passage 3, adjacent the outer terminal thcrco'i, is a passage 5 which leads into the piston receiving bore or suction passage 7. This passage 7 opens at its outer end through the edge ot' the plate 1 and is disposed in parallel relation to the passage 3. Communication between the passage 7 and the opening Q isestablished by a suction passage 16. The air let into the manifold passes into the outer end of the member 7, into the passage 5 and thence into the air inlet passage 3.

As a means for controlling the Volume of air which may enter the passage .3 from the passage 5, I employ a controlling screw 1 which is threaded in the outer end of the passage 3 and may, as will be readily seen upon reference to Fig. 1, be adjusted to control the effective cross sectional area of the passage 5. f

An internally threaded tubular piston 6 is mounted for sliding movement in the passage 7. 0n the outerend of the tubular piston is 'formed a Valve head 8 which is adapted to engage against the edge of the body plate for sealing the outer end of the passage 7, whereby the passage 3 may loe` sealed to the atmosphere. yThe inner end of the piston G is equipped with a head 13 which is of such diameter that it snugly cngages in the passage 7 whereby it will incre inwardly through the passage 7 in response to the creation of a. partial vacuum therein, as when the engine is running on` closed throttle. n adjusting screw 9 is threaded through the piston to project at its inner end beyond the head 13 thereof. A head 11 carrcd on the inner end of the adjusting screw 9 is connected to the outer end of a helical spring 12 which is arranged Within the passage 7 at the inner end thereof. A lock nut rammed .nay 2e, 1915.

10 is provided to hold the screw 9 in its adsI j listed position in the piston. A stop screw 14 is also threaded into the body plate and projected at its inner end in the path of the piston head 13 so that the piston4 and spring willv be held against accidental displacement on the valve. i

From the `foregoing description, the actual construction and 'arrangement of the several parts of the valve will now be unrelatively simple,

' by means of the screw stated, is of the hea-.d 8 and the adjacent face derstood, anditiherefore remains to explain briefly the manner in which the valve operates, when in use.

Normally. the valve head 8 is held in spaced relation to the adjacent face of the body plate l, by the spring 12 which, as expansive type. The space normally comprehended between the valve o f the body plate may be readily varied by adjusting the screw 9, as will be readily observed upon reference to Fig. l. Under normal conditions the valve 8 remains in open position for the spring 12 is of sutiicient strength to resist a slight difference in the pressure within the manifold pipe and atmospheric pressure. When the suction increases within the manifold, however, as when the engine is running on closed throttle and a relatively high vacuum is produced within the manifold, the valve 8 moves to closed position against ber l, since the spring 12 isnot of sufficient strength to compensate for a material difference between the pressure in the chamber.y

7 and atmospheric pressure.

From the foregoing description it will now be apparent that l have provided a auxiliary air valve which is normally open to admit an additional supply of air into the intake manifold when the engine is running under normal conditions but is adapted to automatically close when the engine is running on closed throttle and the vacuum within the intake is relatively high and the mixture is relatively lean as' a consequence. It will also be noted that the' amount of air time, into the manifold may be varied by the controlling screw 4. Furthermore, it will be observed that the valve may be adjusted 9 to open in response to diiferent degrees of suction. j In reduction to practice, it has been found that the form of this invention illustrated in the drawings, and referred to in the above description as the preferred embodiment is the most eiiicient and practical; yet realizing that the conditions concurrent with the adoption of this device will necessarily vary, it is desirable to' emphasize the fact that various minor changes in the details of construction, proportion and arrangement of parts may be resorted to, when required, without sacrificing any of the advantages of this invention, as defined by the appendedclaims.

What I claim as new a by Letters Patent isz- 1. An auxiliary air valve for internal combustion engines including a body plate, adapted to be interposed between the coupling flangesy of the intake manifold and the carbureter, said plate being provided with a circular opening adapted to aline d desire to secure the adjacent face of the body mem- Y admitted, per unit ofv with the passage in the manifold, an air inlet passage leading into the opening, a suction passage communicating with the opening and with the air inlet passage, a piston slidable -in the suction passage, a valve head carried on the -outer end ofthe piston and engageable. against the outer edge of the body plate when spring arranged at the inner end thereof, said spring normally tending to hold the valve in open position.

2. An auxiliary air bustion engines incl adapted-to b e interposed between thel coupling flanges of the intake manifoldand the carbureter, said plate being provided with a circular opening adapted to aline with the passage in the manifold, an lair inlet passage leading into the opening, a suction passage communicating with the opening and with the air inlet passage, able in the suction passage, a valve head carried on the outer end of the piston and engageable against the'outer edge of the body plate when in closed position, a spring arranged in the suction passage and at the inner end thereof, said spring normally'tending to hold the valve in open position, and externally operable vmeans for adjusting the tension of the spring.

3.' An auxiliary air valve for internal coinbustion engines includ valve for internal comadapted'to be interposed between.v the coupling flanges of the intake manifold and the carbureter, said plate being provided with a circular opening adapted to aline with the passage in the manifold, an air inlet passage leading into the opening, a suction passage communicating with the air inlet passage, apiston slidable in the suction passage` a valve head carried on the outer end of the piston and engageable against the outer edge of the body plate when in closed position, a spring arrange in the suction passage and at the inner end thereof, said spring normally tending to hold-the valve in open position, externally operable means for adjusting the tension of the spring, and means for varying the volume of air which may pass. per a unit of time into the air inlet passage.

v 4. An auxiliary air valve for internal combustion engines comprising a plate-like casing having an opening therethrough for alining with a passage in the manifold pipe, an inlet passage leading into said opening, a suction passage connected with the air inlet passage and with said opening, a piston slidable in the suction passage and having-a valveon its outer end for con-- uding a 'body plate,'

a piston slid.

the opening and j with close when the vacuum is high and to open, When the vacuum decreases, and means for adjusting the tension of the spring, whereby the opening and closing of the valve may be variech i 5. An auxiliary air valve for internal conibustion engines including a body plate having an opening adapted to aline with the passage of a manifold pipe, an air inlet pasinto this opening, a suction passage parallel to the air inlet passage, passages establishing oommunication between the suction passage and the air passage and the suction passage and the opening, an internally threaded tubular piston slidable in the suction passage, a valve head carried by the outer vend of the piston, a spring arranged- Within the suction passage for normally holding the valve in open position, and an adjusting screw threaded through the lpiston and operable for varying the tension of the spring, said spring being adapt- WILLIAM P.

WELCH, ALANsoN B.

TREAT. 

